Use the Data Table below for Questions 4 and 5: 4.. A mixture contains 2 out of the 4 substances (A, B,C, D). the mixture dissolves in solution 1, fizzes
with solution 2, and turns dark blue in solution 3. The mixture is most likely a
combination of which 2 substances? A). A and B B). B and C C). C and D D).B and D

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

Iknow #2 is d. i just need to know why